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Python

"""Config flow for AquaLogic."""
import contextlib
import threading
from typing import Any, override
from aqualogic.core import AquaLogic
import voluptuous as vol
from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
from homeassistant.const import CONF_HOST, CONF_PORT
from homeassistant.helpers import config_validation as cv
from .const import DOMAIN
STEP_USER_DATA_SCHEMA = vol.Schema(
{
vol.Required(CONF_HOST): str,
vol.Required(CONF_PORT): cv.port,
}
)
# Worst case scenario, this covers both a plain socket timeout (READ_TIMEOUT)
# and an additional frame-scan timeout (another READ_TIMEOUT), plus one second.
_PROBE_TIMEOUT = AquaLogic.READ_TIMEOUT * 2 + 1
class CannotConnect(Exception):
"""Error to indicate we cannot connect."""
class InvalidDevice(Exception):
"""Error to indicate the device is not an AquaLogic panel."""
def _verify_device(host: str, port: int) -> None:
"""Connect and verify the device is an AquaLogic panel.
Raises CannotConnect if the host is unreachable.
Raises InvalidDevice if no valid AquaLogic data is received within the timeout.
"""
confirmed = threading.Event()
def _on_data(_: AquaLogic) -> None:
confirmed.set()
panel = AquaLogic()
try:
panel.connect(host, port)
except OSError as err:
raise CannotConnect from err
probe = threading.Thread(target=panel.process, args=(_on_data,), daemon=True)
probe.start()
try:
confirmed.wait(timeout=_PROBE_TIMEOUT)
finally:
if (sock := panel._socket) is not None: # noqa: SLF001
with contextlib.suppress(OSError):
sock.close()
if not confirmed.is_set():
raise InvalidDevice
class AquaLogicConfigFlow(ConfigFlow, domain=DOMAIN):
"""Handle a config flow for AquaLogic."""
VERSION = 1
@override
async def async_step_user(
self, user_input: dict[str, Any] | None = None
) -> ConfigFlowResult:
"""Handle the initial step."""
errors: dict[str, str] = {}
if user_input is not None:
self._async_abort_entries_match(user_input)
try:
await self.hass.async_add_executor_job(
_verify_device, user_input[CONF_HOST], user_input[CONF_PORT]
)
except CannotConnect:
errors["base"] = "cannot_connect"
except InvalidDevice:
errors["base"] = "invalid_device"
else:
return self.async_create_entry(title="AquaLogic", data=user_input)
return self.async_show_form(
step_id="user", data_schema=STEP_USER_DATA_SCHEMA, errors=errors
)
async def async_step_import(self, import_data: dict[str, Any]) -> ConfigFlowResult:
"""Import AquaLogic config from configuration.yaml."""
self._async_abort_entries_match(
{CONF_HOST: import_data[CONF_HOST], CONF_PORT: import_data[CONF_PORT]}
)
try:
await self.hass.async_add_executor_job(
_verify_device, import_data[CONF_HOST], import_data[CONF_PORT]
)
except CannotConnect, InvalidDevice:
return self.async_abort(reason="cannot_connect")
return self.async_create_entry(title="AquaLogic", data=import_data)